Only path requirements are relevant to optimized urls

The bit of URL generation that is optimized is the generation of
the path so things like :host, :port, etc. are irrelevant.

actionpack/lib/action_dispatch/routing/route_set.rb

@@ -157,7 +157,7 @@ def self.create(route, options)
           end
 
           def self.optimize_helper?(route)
-            !route.glob? && route.requirements.except(:controller, :action, :host).empty?
+            !route.glob? && route.path.requirements.empty?
           end
 
           class OptimizedUrlHelper < UrlHelper # :nodoc: